Stop-motion.



F. H. HALL.

V STOP MOTION. v APPLICATION TILED FEB. 1, 1910. 1,076,980, Patented 001;. 28, 1913.

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F. H. HALL.

STOP MOTION.

APPLICATION FILED rmm, 1910.

Patented Oct. 28, 1913.

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against the free end of the knock ofl' lever- 15 and acts topress the same outward, said action of spring 20, however, not being suiticient to move said knock off lever against.

the resistance of the shipper lever 9.

ithin the casing 14 is mounted the magnet 21 having pole pieces 22, 22, the ends of the magnet coil being connected with the binding posts 23 and 24, secured in the electric insulation 25, of which post 24 has the spring contact 26 furnished with the end 27 and the bend 28. Slidably mounted in guides formed in the side walls of casing 14 is the armature 29 having the ears 30, 31, located at its respective ends, and in one edge the notch 32, the edges whereof form respectively the shoulder 33 and the cam 34. Engaged with said notch 32 of the armature 29 is the tooth 35 of the slidable member 36 which tooth has the cam edge 37 and the shoulder 38 and is normally held in engagement with notch 32by the spring 39, secured to said member 36 and to the insulation 25, while provision is made by means of the stud 40 on said member 36 for connecting saidmember withsome moving part of the loom. Casing 14 is also furnished with the cover 41' the edges of which bear against the armature 29 and hold the same in sliding contact with the pole pieces 22, 22, of the magnet 21 while said edges of the cover also limit the sliding movement of the armature by intercepting the ears 30 or 31 thereof. If, now, the member 36 is connected with a moving part of the loom or other machine, to which this knock off mechanism is attached, said member 36 and the armature 29, in engagement therewith will be reciprocated back and forth during the normal operation of the machine. Should, however, the electric circuit be completed through the binding posts 23, 24,

and through a source of electrical energy, by any mechanism operated manually or by or thrc gh the occurrence of a fault in the op- "ration of the machine, it will be seen that the magnet and its pole pieces 22, will become electrically energized and will attract and hold the armature thereupon, on the outward movement of the member 36, the cam edge 37 will ride over the cam edge of tl e armature 29 to a position where its end will engage the lip 1'7 of the lever 15, and thus effect the swinging of said lever, whereby the shipper lever 9 will be moved out of engagement with the shoulder 12 of its retaining device to a point where said shipper lever may move along the slot 10. in such movement the knock off lever 15 wings to the position indicated in Fig. 4,

in whichthe contact 18 is swung away from the spring contact 26 and the end of the insulation 19 bears against said spring contact 26 and the electric circuit is broken.

As herein shown as applied to a loom the stop motion or shipper lever knock off mechanism is actuated by the connecting rod 42 which is connected at one end with one otthe usual lay swords 43 and, at the other end, has the slot 44 which is slidably engaged with the stud 40 of the member This slot 44 is of such length, adjustable by the block 45 and the screw 46, as compared with the movement of the lay sword at the point at which the rod 42 is secured thereto, that a lost motion of said rod occurs for the greater part of its movement and that the stud 40 is actuated in either direction only as the lay completes its movement in that direction. As the movement of member 36 to actuate lever 15 and knock off the shipper lever 9 does not necessarily exceed one sixth of the movement of the lay and of its sword 43 it is evident, that, during the remaining five sixths of the movement of the lay, the armature 29 is at rest and may be so held by an extremely light electric current supplied to the magnet 21.

The circuit closing mechanism herein shown includes a pair of brackets as 47 which are mountedin the loom andare connected with the arm X of the electric cir+ cuit' which, as stated above, may be repre+ sented by parts of the loom frame. Said brackets as 47 are connected by pairs of terminal guide rods 48, 48 on each pair of which are slidably engaged, drop wires or devices 49, 49 formed of thin sheet metal and having slots 50, 50, engaged with the terminals, and curved at their upper ends so that one or more of said drop devices, normally sustained by warp threads, may upon the failure of the warp th eads, movedownward and swing'toward one of the lease rods 51, 51: these lease rods being mounted in cross arms as 52 which are carried by the plates as 53 sustained'by but insulated, electrically, from the brackets as 47 and connected by the arm Y of the electric circuit, through battery 54 or other source of electrical energy with the binding post 23 of the loom stopping mechanism.

hen the electric circuit X-Y is closed, by one or more of the drop devices 49, between the guide rod terminals 48 and the lease rod terminals 5101' between any other terminals with which the circuit closers are adapted to cooperate, the magnet 21 of the stop motion is energized and the armature 29 is attracted thereby. hilethe closing of the electric circuit efiects, ultimately, the

attraction of the armature, by the magnet, without referenceto the relative positions of said knock off member 36 and the head 17 of the member 36, and it is necessary to move the armature backward. toward the right as shown in lilg. A, to a polnt where the cam 34- while at rest will act as a uide to direct the cam end 37 of the member 36 outward upon the next knocking oil movement of said member 36; this is accomplished by the positive engagement of the shoulder 38 of the member 36 with the similar shoulder of the armature and the positive retraction movement of said knock off member 36.

It is evident that the member 36 may be actuated in its back and forth movement by other means than the rod 42; and it is apparent that the invention is not necessarily limited to the cams 3A and 37 as a means for eilecting the movement oi. the member 36 to a position to engage the lip 17 of the knock off lever 15. N or is it my intention to limit this invention except as herein claimed.

The elements herein described as the pole pieces 22, 22, may represent any parts of the magnet adapted to be energized by a current of electricity, supplied to the magnet, to attract the armature.

In some cases the lever 15 may be omitted and the member 36 then becomes the knocking off means as, in fact this member always delivers the knock off thrust or blow.

Having thus described my invention I claim as new and desire to secure by Letters Patent- 1. A stop motion comprising an electromagnet, an armature movably mounted andin constant mechanical contact with a pole of said magnet, and knocking oii means normally movable in unison with said armature.

2. A stop motion comprising an electromagnet, an armature in slidable contact with a pole of said magnet, and knocking oil means normally movable in unison with said armature.

in constant mechanical contact with a pole of said magnet, and means for effecting the movement of said armature, said means including a knock off device.

6. A stop motion comprising a knock oli device movably mounted, and guiding means for said knock oii', said guiding means having an: armature, and a magnet with a pole of which said armature is in constant contact.

magnet, an armature movably mounted in contact with a pole of said magnet, said armature having a cam, and a knock off, movable with respect to said armature andadapted to be guided in the knock off direction by said cam.

8. A stop motion comprising a pair of members mounted to move in unison, under normal conditions, and having cooperating means for guiding one of said members with respect to the other when the movement of one of said members is arrested, and electrical controlling means in contact with one or said members, substantially as described.

9. A stop motion comprising an electromagnet, an armature mounted to move in contact with a pole of said magnet, and having a cam, and a knock off member positively engaged with said armature to move the same in one direction and having a cam face adapted to be guided by the armature cam at times.

10. A stop motion comprising an electromagnet, an armature in slidable contact with a pole of said magnet and having a cam and a shoulder, and a knock off member movably mounted and having a tooth engaged between said cam and said shoulder.

11. A stop motion comprising an electromagnet, an armature in slidable contact with a pole of said magnet and having a cam and a shoulder, and a knock off member mounted to slide and swing and having a tooth engaged between the cam and shoulder of the armature, and a spring acting to hold the knock on" member in such engagement.

12. A stop motion comprising an electro magnet having pole pieces extending laterally thcrcfrom, an armature slidably mounted and having a face in contact with said pole pieces and having at one edge a cam and a shoulder, a knock off member slidably mounted and having a cam tooth engaged between said cam and shoulder, and a spring, connected with said knock ofi member and a fixed part of the machine, and acting to holdsaid cam tooth in engagement with said armature, substantially as described.

13. A stop motion comprising an electromagnet, an armature in slidable contact therewith and having a cam, a knock off member movably mounted and having a cam tooth in engagement with the armature "I. A stop motion comprising an electrocam, and a knock off lever pivotallymounteidi and% having an extension located outof: the normal path of said knock 01f member, with which extension tlie-knock'ofi member is adapted to engage under relative movement of said knock off. member and said armature;

145. Stopping or controlling apparatus comprising an armature having a definite path of movement, a knock off member normally' operating with said armature, and. an electromagnet' related tosaid armature and adapted: when energized'to arrest saidarmature at any point inits movement.

15. Stopping or. controlling apparatus compr-ising'an armature slidablymounted, a knock off member normally'operating with saidarmature, an, electromagnet' related: to said armature, and means for positively preventing the movement of said armature: towar'dzori from said magnet.

16. Stopping apparatus comprising an: armature having" a linear path I of movement,

electromagnet means for arresting; said armature'at any point in: its forward movement, and: mechanical stoppingmechanism having a member controlled as to its opera-- tion bysaid armature.

1-7. Stopping or cont-rolling, mechanism comprising two relatively movable members one of which is an armature and the other an electromagnet, said members being in constant mechanical contact whereby the energizing; of said magnet is adapted toarrest said relative movement, and a knock off member releasablyengaged.- wlth one=ofsa1d Copies 01 thispatent m'ay be obtaineddor' five cents each, by

addressing the Commissioner! of 7 Patents;

Washington; I). 0. 

